电子器件2017，Vol.40Issue(6)：1329-1334,6.DOI:10.3969/j.issn.1005-9490.2017.06.001
碳纳米管蒸发特性及其对场发射性能的影响
Evaporation Characteristics Analysis of the CNTs Emitters and Its Influence on the Field Emission Performance
摘要
Abstract
To study the mechanism of current degradation of a field emission cathode,the evaporation characteristics of the CNTs emitters has been taken with a quadrupole mass spectrometer( QMS) in an ultra-high vacuum( UHV) system. It was found that the carbon started to be evaporated out from CNTs cathode when the temperature was higher than 1173 K. After continuous evaporation at 1373 K for 100 hours,the turn-on field intensity and threshold field intensity of CNTs cathode increased 21.7% and 31.7% respectively compared with their original values. Simultaneously,the field enhancement factor decreased approximately 16.2%,and the work function increased about 11.9%. The changes of surface morphology and composition before and after cathode evaporation were characterized by scanning electron microscopy and energy dispersive X-ray spectrometer. The results confirmed that increasing the work function and reducing the field enhancement factor decrease the field emission characteristics of cathode. Therefore,the evaporation plays very important role in the current degradation for the field emission devices.关键词
碳纳米管/场发射/蒸发特性/场增强因子/功函数Key words
carbon nanotube/field emission/evaporation characteristics/field enhancement factor/work function分类
数理科学引用本文复制引用
崔云康,吴庆春,王红兵,唐春红..碳纳米管蒸发特性及其对场发射性能的影响[J].电子器件,2017,40(6):1329-1334,6.基金项目
国家自然科学基金项目(61372030,61674029,11504167) （61372030,61674029,11504167）
江苏省科技厅基础研究计划项目(BK20141390) （BK20141390）
南京工程学院自然科学基金项目( CKJC201602) （ CKJC201602）
江苏省高校自然科学研究项目( 17KJD430003) （ 17KJD430003）
